KR102171451B1 - Scroll-type compressor - Google Patents

Abstract

The present invention relates to a compressor, and more particularly, to a scroll type compressor including a stator assembly in consideration of space efficiency. The present invention, in the scroll type compressor, the casing having a sealed inner space; It is installed in the inner space of the casing and generates a rotational force, and a stator assembly including a stator in which a winding is installed, an insulator for insulating the winding by being coupled to the stator, and a rotor coupled to the stator assembly and rotating motor; And an inverter part electrically connected to the motor to drive the motor, wherein the insulator of the motor comprises: a hook part located on one side of the stator; And an insertion portion positioned on the other side of the stator on an opposite side of the hook portion, and an end portion of the winding may be connected between the hook portion and the insertion portion.

Description

Scroll-type compressor {Scroll-type compressor}

The present invention relates to a compressor, and more particularly, to a scroll type compressor including a stator assembly in consideration of space efficiency.

A scroll type compressor is a type of compressor capable of compressing a fluid such as a refrigerant while a fixed scroll is fixed in an inner space of a sealed casing, and a orbiting scroll is engaged with the fixed scroll to perform orbital motion.

These scroll type compressors can obtain a relatively high compression ratio compared to other types of compressors, and also have the advantage of obtaining stable torque by smoothly continuing the suction, compression and discharge processes of fluids, so they are widely used for refrigerant compression in air conditioners, etc. Is being used.

A compressor including such a scroll type compressor can be operated by driving a motor by an inverter.

The motor is installed in the inner space of the casing to generate rotational force, and includes a stator assembly in which the winding is installed, an insulator coupled to the stator to insulate the winding, and a rotor coupled to the stator assembly and rotating. I can.

In this way, the stator assembly may include a stator made of metal and an insulator coupled to the stator.

Typically, a terminal block is connected to an end portion of the winding, and such a terminal block may be provided on one side of an insulator to occupy space. This may be for securing an insulation distance between the casing and the stator.

Therefore, due to the insulation problem, there is a problem such as a narrow space between the motor and the casing, and it is difficult to arrange the windings.

The technical problem to be achieved by the present invention is to solve the above problems, and a scroll type compressor that enables an insulating distance between the end portion of the winding wound around the stator and the casing, and between the end portion of the winding and the stator can be secured. Want to provide.

In addition, it is intended to provide a scroll type compressor that can improve space efficiency in a casing.

In addition, it is intended to provide a scroll type compressor that does not require individual terminal terminals separately formed on the stator.

As a first aspect for achieving the above technical problem, the present invention, in the scroll type compressor, the casing having a sealed inner space; It is installed in the inner space of the casing and generates a rotational force, and a stator assembly including a stator in which a winding is installed, an insulator for insulating the winding by being coupled to the stator, and a rotor coupled to the stator assembly and rotating motor; And an inverter part electrically connected to the motor to drive the motor, wherein the insulator of the motor comprises: a hook part located on one side of the stator; And an insertion portion positioned on the other side of the stator on an opposite side of the hook portion, and an end portion of the winding may be connected between the hook portion and the insertion portion.

In addition, at least one of the hook portion and the insertion portion may be press-fitted to the inner peripheral surface of the casing to be fixed.

In addition, the insulator is coupled to the inside of the stator, and may have a shape protruding to both sides of the stator.

In addition, the hook portion may be formed on an insulator protruding toward one side of the stator.

In addition, the insertion part may be formed on an insulator protruding to the other side of the stator.

In addition, the hook portion and the insertion portion may be formed in a radial direction on one side and the other side of the stator.

In addition, the winding may further include a terminal connected to the hook portion to be inserted into the insertion portion.

In addition, the terminal may be inserted into an insertion hole formed in the insertion portion.

In addition, the terminal may include a tightening portion to which the end of the winding is fixed.

In addition, the insertion unit may include an insertion hole into which the insertion unit is inserted; And a fixed jaw on which the terminal is hooked and fixed.

In addition, at least one of the inner surfaces of the insertion hole may be inclined.

In addition, an installation hole in which an airtight terminal connected to the inverter unit is installed may be formed in the insertion hole.

As a second aspect for achieving the above technical problem, the present invention is a scroll type compressor including a motor, wherein the motor is installed in the inner space of the casing to generate rotational force, and has a cylindrical shape in which a winding is installed. A stator assembly including a stator and an insulator coupled to the stator to insulate the winding; And a rotor coupled to the stator assembly and rotating, wherein the insulator of the motor includes a hook portion positioned on one side of the stator; An insertion part located on the other side of the stator on an opposite side of the hook part; And a terminal connected in a state in which the winding is positioned on the hook portion and inserted into the insertion portion.

In addition, the insulator is coupled to the inside of the cylindrical shape of the stator, and may have a shape protruding toward both sides in the center direction of the cylindrical shape of the stator.

In addition, the hook portion may be formed on an insulator protruding toward one side of the stator.

In addition, the insertion part may be formed on an insulator protruding to the other side of the stator.

In addition, the hook portion and the insertion portion may be formed in a radial direction on one side and the other side of the stator.

In addition, the insertion unit may include an insertion hole into which the insertion unit is inserted; And a fixed jaw on which the terminal is hooked and fixed.

In addition, at least one of the inner surfaces of the insertion hole may be inclined.

Further, an inverter part electrically connected to the motor to drive the motor may be further included, and an installation hole in which an airtight terminal connected to the inverter part is installed may be formed in the insertion hole.

The present invention has the following effects.

First, it is possible to secure an insulation distance between an end portion of a winding wound around a stator and a casing, and between an end portion of a winding and a stator.

In addition, the width of the stator assembly of the motor can be reduced, thereby improving the space efficiency in the casing.

In addition, a structure in which the terminal is included on the insulator side can be provided, and thus, it is not necessary to manufacture individual terminal terminals, and accordingly, the manufacturing cost and the number of manufacturing processes can be reduced.

In addition, in this way, since the terminal space in the upper part of the motor can be eliminated, the volume (width) of the entire motor can be reduced.

1 is a cross-sectional view showing a scroll type compressor according to an embodiment of the present invention.
2 is an enlarged view of part A of FIG. 1.
3 is a front view showing a stator assembly according to an embodiment of the present invention.
4 is a perspective view showing the structure of a stator assembly according to an embodiment of the present invention.
5 is a front view showing a compressor to which the structure of a stator assembly according to an embodiment of the present invention is applied.
6 is a partial cross-sectional view showing a compressor to which the structure of a stator assembly according to an embodiment of the present invention is applied.
7 is a perspective view showing a terminal according to an embodiment of the present invention.
8 is a perspective view showing an insertion structure of a terminal according to an embodiment of the present invention.
9 is a cross-sectional view showing a state in which a terminal is inserted into an insertion unit according to an embodiment of the present invention.
10 is a cross-sectional view showing an inserted state of a terminal according to an embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

While the present invention allows various modifications and variations, specific embodiments thereof are illustrated and shown in the drawings, and will be described in detail below. However, it is not intended to limit the present invention to the particular form disclosed, but rather the present invention encompasses all modifications, equivalents and substitutions consistent with the spirit of the present invention as defined by the claims.

When an element such as a layer, region or substrate is referred to as being “on” another component, it will be understood that it may exist directly on another element or there may be intermediate elements between them. .

Although terms such as first, second, etc. may be used to describe various elements, components, regions, layers and/or regions, these elements, components, regions, layers and/or regions It will be understood that it should not be limited by these terms.

1 is a cross-sectional view showing a scroll type compressor according to an embodiment of the present invention. 1 shows a horizontal scroll type compressor. 2 is an enlarged view of portion A of FIG. 1.

This horizontal scroll type compressor 100 includes a casing 110 having a sealed internal space, and components for compressing fluid may be installed in the casing 110. That is, in the casing 110, a motor 200, a rotating shaft 300, a fixed scroll 500 and a revolving scroll 600 engaged with each other, and a frame 400 in which the rotating shaft 300 is installed may be included. .

The casing 110 for forming a closed space may be formed in a horizontal cylinder shape. The casing 110 may be provided with a suction port 111 and a discharge port 112 for entering and exiting the refrigerant.

A motor 200 for generating a rotational force may be installed in the inner space of the casing 110. In addition, a rotation shaft 300 coupled to the rotor 210 of the motor 200 may be installed.

This rotation shaft 300 may be eccentrically coupled to the orbiting scroll 600. That is, the motor 200 may provide rotational force through which the orbiting scroll 600 may orbit through the rotation shaft 300.

A frame 400 may be installed on one side of the motor 200. The frame 400 may be formed of a material having high hardness, such as cast iron, as a main frame.

This frame 400 may provide a support structure in which the fixed scroll 500 and the orbiting scroll 600 can be installed. That is, the fixed scroll 500 may be coupled to the frame 400 to form a compressed space 501.

At this time, the casing 110 includes a discharge chamber 101 in which refrigerant gas is discharged from the compressed space 501, and the discharge port 112 is provided in the discharge chamber 101, and the refrigerant in the discharge chamber 101 May be discharged through the discharge port 112.

In the discharge chamber 101, the oil may be separated from the refrigerant, and in this case, the oil separated at the lower side may be sucked through the oil pickup 113 and supplied to each rotating part.

A separate inverter space may be provided on the side of the suction port 111 of the casing 110, and the inverter unit 120 may be located in the inverter space. Meanwhile, an airtight terminal 240 (see FIG. 2) connected to the motor 200 may be located inside the inverter space.

The motor 200 is installed in the inner space of the casing 110 to generate rotational force, and a stator including a stator 220 on which a winding is installed and an insulator 230 coupled to the stator 224 to insulate the winding It may include an assembly 220 and a rotor 210 coupled to the stator assembly 220 and rotating.

In this way, the stator assembly 220 may include a stator 224 made of metal and an insulator 230 coupled to the stator 224.

This insulator 230 is coupled to the inner surface of the stator 224 forming a cylindrical shell shape (or cylinder shape), and may have a shape protruding to both sides of the stator 224.

That is, the cylindrical stator 224 may protrude to both sides of the center direction (ie, the direction crossing the center).

In this case, a hook portion 231 may be formed on one side of the insulator 230, and an insertion portion 232 may be positioned on the opposite side of the hook portion 231 on the other side of the insulator 230. Accordingly, the end portion 233 of the winding may be connected between the hook portion 231 and the insertion portion 232.

In this way, the winding connected between the hook part 231 and the insertion part 232 may be connected to the inverter part 120 through the hermetic terminal 242.

The configuration related to the stator assembly 220 and the insulator 230 will be described in detail later.

Meanwhile, a sealing structure 310 for sealing a compression space may be installed on one side of the frame 400 while fixing the rotation shaft 300 so as to be rotatable. On the other hand, in some cases, the bearing 320 is also installed at the inner end side of the casing 100 so that the rotating shaft 300 can rotate smoothly.

Between the fixed scroll 500 and the frame 400, an orbiting scroll 600 may be installed that is coupled to the fixed scroll 500 and performs orbiting motion with respect to the fixed scroll 500.

The orbiting scroll 600 is connected to the rotation shaft 300 and is eccentrically coupled to the center of the rotation shaft 300 to implement a orbiting motion.

At this time, an elastic plate (not shown) forming a circular shape may be interposed between the fixed scroll 500 and the frame 400.

In this way, in the scroll type compressor 100, the compression chamber 501 is formed between the orbiting scroll 600 and the fixed scroll 500, and the back pressure chamber is between the orbiting scroll 600 and the frame 400 ( 401) can be formed.

A balance weight 700 may be installed in the back pressure chamber 401 to offset centrifugal force generated by the orbiting of the orbiting scroll 600. The balance weight 700 may be installed on the rotation shaft 300 and may be installed on a side opposite to the eccentric direction of the rotation shaft 300.

Referring to FIG. 2, a hook portion 231 may be formed on one side of the insulator 230, and an insertion portion 232 may be positioned on the opposite side of the hook portion 231 on the other side of the insulator 230.

3 is a front view showing a stator assembly according to an embodiment of the present invention.

Referring to FIG. 3, a winding is wound around the inner protrusions 223 provided in plural along the inner side of the stator 224, and these windings are separated according to the three phases of U-phase, V-phase, and W-phase and protrusion 223 It is wound alternately at regular intervals.

In this way, a plurality of protrusions 223 are provided at regular intervals along the inner side of the stator 224, and the windings may be separated according to three phases of U-phase, V-phase and W-phase and wound in sequence. The winding wound around the protrusions 223 may be located in a grid-like space between the protrusions.

Referring back to Figure 2, the end portion of this winding is closed in the opposite direction of the inverter unit 120, the end portion 233 of this winding is connected between the hook portion 231 and the insertion portion 232 It may be connected to the inverter unit 120 through the hermetic terminal 240.

In addition, at least one of the hook portion 231 and the insertion portion 232 may be press-fitted to the inner peripheral surface of the casing 110 to be fixed. 2 shows a state in which both the hook portion 231 and the insertion portion 232 are pressed into the inner circumferential surface of the casing 110 to be fixed.

Typically, a terminal block is connected to an end portion of the winding, and such a terminal block may be provided on one side of the insulator 230 to take up space. This may be for securing an insulation distance between the casing 110 and the stator 224.

Therefore, due to the insulation problem, there are problems such as a narrow space between the motor 200 and the casing 110 and it is difficult to arrange the windings.

However, according to the structure described above, an insulating distance can be secured between the end portion 233 of the winding and the casing 110 (B) and between the end portion 233 of the winding and the stator 224 (C).

In addition, since the width W of the stator assembly 220 of the motor 200 may be reduced, space efficiency in the casing 110 may be improved.

4 is a perspective view showing the structure of a stator assembly according to an embodiment of the present invention. In addition, Figure 5 is a front view showing a compressor to which the structure of the stator assembly according to an embodiment of the present invention is applied.

As described above, a winding is wound on the inner protrusion 223 provided in plurality along the inner side of the stator 224, and this winding is a central hole 221 in which the rotor 210 of the stator 224 is located. It is located in the lattice-like space 222 located outside of the.

In this way, the end portion 233 of the winding located in the grid-like space 222 is closed in the opposite direction of the inverter unit 120, which may be for connecting the end portion 233 of the winding to the hermetic terminal 242. have.

In this way, the end portion 233 of the winding passes through the insertion portion 232 while being caught by the hook portion 231 formed on the outer circumferential portion of the insulator 230 located on one side of the stator 224 and passes through the sealing terminal 242 ) Can be connected.

The winding may include three bundles of windings forming three phases, and thus the end portions 233 of the three windings may be connected to the insertion portion 232 through the hook portion 231. At this time, as shown, the end portion 233 of the winding may be connected to the insertion portion 232 through the outside of the stator 224.

6 is a partial cross-sectional view showing a compressor to which the structure of a stator assembly according to an embodiment of the present invention is applied.

As shown, the end portion 233 of the winding may be connected to the insertion portion 232 through the hook portion 231. At this time, as shown, the terminal 250 is coupled to the end portion 233 of the winding and may be inserted into the insertion portion 232.

In this way, the winding may be connected while being positioned on the hook portion 231, electrically connected to the terminal 250, and inserted into the insertion portion 232.

In this case, the terminal 250 in the insertion part 232 may be connected to the hermetic terminal 240. That is, the terminal 250 may be connected to the first connection part 241 of the hermetic terminal 240 within the insertion part 232. In addition, the second connection portion 242 protruding in a direction opposite to the first connection portion 241 of the hermetic terminal 240 may be connected to the inverter unit 120.

As described above, since the part in which the motor 200 is installed and the space in which the inverter unit 120 is installed are isolated so that the refrigerant cannot enter and exit, the winding and the inverter unit 120 may be connected through the hermetic terminal 240.

Referring to FIG. 6, the insertion part 232 is press-fitted to the inner circumferential surface of the casing 110 and is fixed. Of course it can be.

In this way, a structure in which the terminal 250 is included in the insulator 230 side can be provided, and thus, it is not necessary to manufacture an individual terminal terminal, and accordingly, the manufacturing cost and the number of manufacturing processes can be reduced.

In addition, in this way, since the terminal space above the motor 200 can be eliminated, the volume (width) of the entire motor 200 can be reduced.

7 is a perspective view showing a terminal according to an embodiment of the present invention.

Referring to FIG. 7, the terminal 250 may be positioned in a state in which most of its shape is inserted into the insertion part 232. Meanwhile, the terminal 250 may include a tightening part 251 to which an end of the winding is fixed.

The tightening part 251 may be an integral part while being electrically coupled with the shortest part of the winding by applying pressure from the outside in a state in which the shortest part of the winding is inserted.

In addition, the terminal 250 may include a connection groove 252 to which the first connection portion 241 of the hermetic terminal 240 is connected. That is, the first connection portion 241 of the hermetic terminal 240 and the shortest end of the winding may be connected through the connection groove 252. In this case, as described above, such a connection state may be made within the insertion part 231.

8 is a perspective view showing an insertion structure of a terminal according to an embodiment of the present invention. 9 is a cross-sectional view showing a state in which a terminal is inserted into an insertion unit according to an embodiment of the present invention. 10 is a cross-sectional view showing an inserted state of a terminal according to an embodiment of the present invention.

Hereinafter, a state in which the terminal 250 according to an embodiment of the present invention is installed will be described with reference to FIGS. 8 to 10.

Referring to FIG. 8, the terminal 250 may be inserted into an insertion hole 237 formed in the insertion part 232. In this case, the insertion part 232 may be located on the outer periphery of the insulator 230. That is, the insertion part 232 may be located outside the insulator 230 in the radial direction.

In this way, the terminal 250 is inserted into the insertion part 232 from the outer part of the stator 224, so that the end part 233 of the winding may be connected to the inverter part 120 side through the outside of the stator 224. have.

Referring to FIG. 9, the terminal 250 may be inserted into the insertion hole 237 formed in the insertion portion 232 in an oblique diagonal direction. At this time, at least one of the inner surfaces of the insertion hole 237 may be inclined. That is, the insertion hole 237 may include an inclined surface 234.

This inclined surface 234 may help to smoothly insert the terminal 250.

Meanwhile, the insertion hole 237 may include a stopper 235 through which the terminal 250 is caught and fixed. That is, the fixing jaw 235 may fix the position of the terminal 250.

In this case, an installation hole 236 in which an airtight terminal 240 connected to the inverter unit 120 is installed may be formed under the fixed jaw 235. That is, an installation hole 236 into which the first connector 241 of the hermetic terminal 240 is inserted may be formed in the insertion hole 237.

In this way, the shortest end of the winding and the first connection 241 of the hermetic terminal 240 may be connected through the connection groove 252 of the terminal 250. In this case, as described above, this connection state may be made within the installation hole 236 in the insertion part 231.

Referring to FIG. 10, as described above, after the terminal 250 is inserted into the insertion hole 237 in an inclined direction, it may be seated in the insertion hole 237.

Although the shortest end of the winding is not shown in the tightening part 251 in FIG. 10, the terminal 250 may be inserted and fixed in the insertion hole 237 while the end of the winding is fixed to the tightening part 251.

As mentioned above, the terminal 250 is caught by the fixing jaw 235 formed in the insertion hole 237 to be fixed in position.

Thereafter, the airtight terminal 240 may be coupled, and the first connection part 241 of the airtight terminal 240 may be inserted through the installation hole 236 in the insertion part 231, and thus, the installation hole ( The first connector 241 inserted through 236 may be inserted into and fixed to the connection groove 252 of the terminal 250. Accordingly, the first connection portion 241 of the hermetic terminal 240 is fixed to the connection groove 252 of the terminal 250, so that the hermetic terminal 240 and the end of the winding may be electrically connected. In addition, a state in which the hermetic terminal 240 and the end of the winding are electrically connected may be firmly fixed.

On the other hand, the embodiments of the present invention disclosed in the specification and drawings are only presented specific examples to aid understanding, and are not intended to limit the scope of the present invention. In addition to the embodiments disclosed herein, it is apparent to those of ordinary skill in the art that other modified examples based on the technical idea of the present invention may be implemented.

100: compressor 110: casing
120: inverter unit
200: motor 210: rotor
220: stator assembly 224: stator
230: insulator 231: hook
232: insertion part 240: airtight terminal
250: terminal
300: rotary shaft 400: frame
500: fixed scroll 600: orbiting scroll
700: balance weight

Claims (20)

In the scroll type compressor,
A casing having a sealed inner space;
It is installed in the inner space of the casing and generates a rotational force, and a stator assembly including a stator in which a winding is installed, an insulator for insulating the winding by being coupled to the stator, and a rotor coupled to the stator assembly and rotating Motor-The insulator of the motor includes a hook positioned on one side of the stator; And an insertion part positioned on the other side of the stator opposite the hook part and located at an outer circumference of the insulator and having a fixed jaw formed therein, wherein an end portion of the winding is connected between the hook part and the insertion part;
An inverter unit electrically connected to the motor to drive the motor;
A terminal connected in a state in which the winding is positioned in the hook portion, inserted into an insertion hole formed in the insertion portion, and fixed by the fixing jaw formed in the insertion portion; And
It is configured to include a tightening portion to which the end of the winding is fixed by being electrically coupled to the shortest end of the winding by applying pressure from the outside in the state where the end of the winding is inserted,
In the insertion hole, an installation hole in which an airtight terminal connected to the inverter part is installed is formed, and the terminal is connected to the first connection part of the airtight terminal through the installation hole,
The first connection part inserted through the installation hole is inserted into and fixed to the connection groove of the terminal, so that the airtight terminal and the shortest end of the winding are electrically connected to each other. The scroll type compressor of claim 1, wherein at least one of the hook portion and the insertion portion is press-fitted to the inner peripheral surface of the casing to be fixed. The scroll type compressor of claim 1, wherein the insulator is coupled to the inside of the stator and has a shape protruding to both sides of the stator. The scroll type compressor of claim 3, wherein the hook portion is formed on an insulator protruding toward one side of the stator. The scroll type compressor as claimed in claim 3, wherein the insertion part is formed on an insulator protruding to the other side of the stator. The scroll type compressor of claim 3, wherein the hook portion and the insertion portion are formed on one side and the other side of the stator in a radial direction. delete delete delete delete The scroll type compressor of claim 1, wherein at least one of the inner surfaces of the insertion hole is inclined.

delete delete delete delete delete delete delete delete delete

Images